JLockwood
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I have a 99 Lexus RX300. Car was running fine. Suddenly, CEL appears. Very rough idle, smell of exhaust when it is idling rough, hesitation, and at random speeds engine cuts out like you turned it off and then speeds up again. Codes are P0505, P1354, and random misfire codes for 2, 4, and 6. Car seems to run fairly normal until engine warms up. Removed OCV and cleaned. Connected it to a battery pack and it seems to work as it should( but I dont know what normal is). Should I rule out the OCV ...
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I know you guys haven't been on this thread for quite some time, but now I'm having the same exact issues with my RX300! I've replaced all 6 coils and plugs, mass air flow sensor, both of the cam shaft position sensors, and we tested both of the ocv's to see if they were working and both appear to be working. We also cleaned them. Should I go ahead and replace them even though they are getting voltage, are moving, and have been cleaned??? Also, do I need to change my oxygen sensors? There are 4 of them at $170 a piece!! Please help if you can!! Thank you so much!
